Move Web-facing fullscreen APIs to DocumentFullscreen and ElementFullscreen

Source/core/dom/ElementFullscreen.idl

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+partial interface Element {
+    // Mozilla version
+    const unsigned short ALLOW_KEYBOARD_INPUT = 1;
+    [LogActivity, LogAllWorlds, MeasureAs=PrefixedElementRequestFullScreen] void webkitRequestFullScreen([Default=Undefined] optional unsigned short flags);
+
+    // W3C version
+    [LogActivity, LogAllWorlds, MeasureAs=PrefixedElementRequestFullscreen] void webkitRequestFullscreen();
+
+    attribute EventHandler onwebkitfullscreenchange;
+    attribute EventHandler onwebkitfullscreenerror;

[falken, 2014/08/08 02:28:18]

Just to make sure I understand, these EventHandlers are not in the spec, but
this patch keeps them to not change existing behavior?

[philipj_slow, 2014/08/08 05:40:48]

Precisely, these were on Element.idl and I moved them here for higher
visibility, no observable change expected. The unprefixed ones won't be on
Element though, just on Document.

+};